The radius of the circle passing through the foci of the ellipse and having its centre at is
The centre of the required circle is at
Radius of the circle
Hence option 1 is correct.
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50 mL of 0.2 M ammonia solution is treated with 25 mL of 0.2 M HCl. If pKb of ammonia solution is 4.75, the pH of the mixture will be : Option: 1 3.75 Option: 2 4.75
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